What We Need Is Here

I need help understanding the lines in Wendell Berry‘s poem the wild geese: “Geese appear high over us, pass, and the sky closes. Abandon, as in love or sleep,holds them to their way,clear, in the ancient faith:what we need is here. “
It’s the use of the word abandon that puzzles me. Are the geese abandoning us? Or is abandon Used to express the fleetingness of reality and it all we have is the present moment?

Abandon as in "with abandon," "reckless abandon," etc. Meaning to do something almost passively or instinctively, without thinking about what you are doing. E.g. with love or sleep, if you try to think about what you are doing, it won't happen at all - you just have to let nature take it's course.